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Diss Factsheets
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EC number: 209-161-3 | CAS number: 557-20-0
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Stability: thermal, sunlight, metals
Administrative data
- Endpoint:
- thermal stability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Apparently well conducted study however a certificate of analysis was not included in the report and the experimental details are limited.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 997
- Report date:
- 1997
Materials and methods
Test guideline
- Qualifier:
- no guideline required
- GLP compliance:
- no
Test material
- Reference substance name:
- Diethylzinc
- EC Number:
- 209-161-3
- EC Name:
- Diethylzinc
- Cas Number:
- 557-20-0
- Molecular formula:
- C4H10Zn
- IUPAC Name:
- diethylzinc
- Details on test material:
- diethylzinc
Constituent 1
Results and discussion
Applicant's summary and conclusion
- Conclusions:
- The DEZ kinetic data are based on the results of 3 methods (DSC, TAM and ARC). From Arrhenius
the activation energy (Ea) = 124.8 kJ/mole and ln C= 37.48. The total heat of decomposition ΔHdec =
1244 kJ/kg.
For DEZ the DSC and TAM results agreed well. The ARC results tends to deviate from DSC and
TAM data. Therefore it is not recommended to extrapolate ARC kinetic data to lower temperatures.
The ARC data of Knoshaug and Akzo Nobel correspond well.
For a non insulated C-430 tank the self accelerating decomposition temperature (SADT) = 90 ºC.
The maximum storage temperature is 70 ºC.
With the overall kinetic parameters the adiabatic induction times (tad) were calculated.
The maximum safe handling time (tsaf,max) is derived from the adiabatic induction time:
t saf,max = 1/4 x tad - Executive summary:
Objective Thermal stability data of diethylzinc (DEZ), determined by means of Differential Scanning Calorimetry (DSC), Accelerating Rate Calorimetry (ARC) and Thermal Activator Monitor (TAM). The results provide kinetic decomposition data based on different methods which are measured in a wide temperature range.
Table 1. Maximum safe handling times DEZ at various temperatures:
Temperature (ºC)
Safe handling time (hours)
90
43.9
100
15.3
110
5.6
120
2.2
130
0.89
140
0.38
150
0.17
160
0.08
Maximum handling times are important for:
destillation and other high temperature process operations
dosing of DEZ at high temperatures to processing units and other high temperature applications
Possibilities for TAM measurements with other metal alkyls are limited because the maximum operation temperature of the TAM equipment is 90 °C. For most metal alkyls this temperature is too low to detect any heat production.
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